Urban air pollution is a major environmental issue that affects many cities around the world. It is caused by the release of pollutants such as smaze and SMOG into the atmosphere. Smaze is a combination of smoke and haze, which is created when burning fossil fuels such as coal and oil. SMOG is a type of air pollution that is created when sunlight reacts with pollutants in the air. Both smaze and SMOG contribute to urban air pollution and can have serious health effects on people living in cities.